T25.7 ICD-10-CA code: Corrosion of third degree of ankle and foot

T25.7 is the ICD-10-CA code for “Corrosion of third degree of ankle and foot” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.

Official description

T25.7

Corrosion of third degree of ankle and foot

Short description: Corrosion of third degree of ankle/foot

ICD-10-CA · Canada · Also written T257

Notes for T25.7

As CIHI prints them, with any note T25.7 takes from the headings above it.

Includes

Use additional code

Add a code for this detail when the note documents it.

Excludes

Conditions classified elsewhere.

  • Erythema [dermatitis] ab igne (L59.0)radiation-related disorders of the skin and subcutaneous tissue (L55-L59)sunburn (L55.-)From T20-T32 Burns and corrosions
  • Birth trauma (P10-P15)obstetric trauma (O70-O71)From Chapter 19: Injury, poisoning and certain other consequences of external causes (S00-T98)

Note

  • The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to multiple or unspecified body regions as well as poisoning and certain other consequences of external causes.Where multiple sites of injury are specified in the titles, the word "with" indicates involvement of both sites, and the word "and" indicates involvement of either or both sites.The principle of multiple coding of injuries should be followed wherever possible.Combination categories for multiple injuries is provided for use when there are insufficient detail as to the nature of the individual conditions, or for primary tabulation purposes when it is more convenient to record single code; otherwise, the component injuries should be coded separately.Reference should also be made to the coding rules and guidelines.The blocks of the S-section as well as (T00-T14 and T90-T98) contain injuries at the three-character level classified by type as follows:Superficial injury including:abrasionblister (nonthermal)contusion, including bruise and haematomainjury from superficial foreign body (splinter) without major open woundinsect bite (nonvenomous)Open wound including:animal bitecutlacerationpuncture wound:• NOS• with (penetrating) foreign bodyFracture including:Fracture:closed: comminuted, depressed, elevated, fissured, greenstick, impacted, linear, simple, slipped epiphysis, spiral — with or without delayed healingdislocateddisplacedFracture:open: compound, infected, missile, puncture, with foreign body — with or without delayed healingExcludes:malunion of fracture (M84.0)nonunion of fracture [pseudoarthrosis] (M84.1)pathological fracture (M84.4):• with osteoporosis (M80.-)stress fracture (M84.3)Dislocation, sprain and strain including:avulsion, laceration, sprain, strain, traumatic: haemarthosis, rupture, subluxation, tear of cartilage, joint (capsule), ligamentInjury to nerves and spinal cord including:complete or incomplete lesion of spinal cordlesion incontinuity of nerves and spinal cordtraumatic:• division of nerve• haematomyelia• paralysis (transient)• paraplegia• quadriplegiaInjury to blood vessels includingavulsion, cut, laceration, traumatic: aneurysm or fistula (arteriovenous), arterial haematoma, rupture of blood vesselsInjury of muscle, fascia and tendon including:avulsion, cut, laceration, strain, traumatic rupture of muscle, fascia and tendonCrushing InjuryTraumatic amputationInjury to internal organs including:blast injuries, bruise, concussion injuries, crushing, laceration, traumatic: haematoma, puncture, rupture, tear of internal organsOther and unspecified injuriesFrom Chapter 19: Injury, poisoning and certain other consequences of external causes (S00-T98)

Where T25.7 sits

  1. 1ChapterChapter 19: Injury, poisoning and certain other consequences of external causes (S00-T98)
  2. 2Block T20-T32Burns and corrosions
  3. 3Block T20-T25Burns and corrosions of external body surface, specified by site
  4. 4Category T25Burn and corrosion of ankle and foot
  5. 5Valid code T25.7Corrosion of third degree of ankle and foot

Source and release

Data release
ICD-10-CA · FY 2026–2027
Effective date
Apr 1, 2026
Publisher
CIHI

This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.

Frequently asked questions

What does ICD-10-CA code T25.7 mean?

T25.7 is the ICD-10-CA code for “Corrosion of third degree of ankle and foot” in CIHI’s ICD-10-CA FY 2026–2027 release.

Where is T25.7 in ICD-10-CA?

T25.7 sits under T25 Burn and corrosion of ankle and foot, within T20-T25 Burns and corrosions of external body surface, specified by site, within T20-T32 Burns and corrosions, within Chapter 19: Injury, poisoning and certain other consequences of external causes (S00-T98).

What coding notes apply to T25.7?

ICD-10-CA lists Includes, Use additional code, Excludes, Note notes for T25.7, including those from the headings it sits under. They are listed on this page with where each one comes from.

Which ICD-10-CA release does this page use?

It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.